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Physiological recalcification of carious dentin.

H Miyauchi, M Iwaku, T Fusayama

    The Bulletin of Tokyo Medical and Dental University
    |September 1, 1978
    PubMed
    Summary

    Human and dog teeth demonstrate physiological recalcification of carious dentin. Calcium content and hardness in dentin layers significantly increased after three months, indicating natural repair processes.

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    Area of Science:

    • Dentistry
    • Biomaterials Science
    • Regenerative Medicine

    Background:

    • Carious dentin poses a challenge in restorative dentistry.
    • Understanding physiological recalcification is crucial for preserving tooth structure.
    • Previous research has explored dentin remineralization, but in-vivo confirmation is key.

    Purpose of the Study:

    • To confirm the capacity for physiological recalcification in human carious dentin.
    • To evaluate dentin repair after cavity preparation and restoration.
    • To assess mineral content changes in dentin over time.

    Main Methods:

    • Human and dog teeth underwent carious dentin removal and staining.
    • One tooth from each pair was extracted immediately; the other was restored and observed for three months.
    • Calcium content and microhardness were measured using electron probe microanalysis and microhardness testing.

    Main Results:

    • Significant increases in calcium content and hardness were observed in the remaining dentin layer after three months in both human and dog teeth.
    • Dentin approached normal levels from within, confirming physiological recalcification.
    • Cavity treatment methods showed minimal impact on the observed recalcification.

    Conclusions:

    • Physiological recalcification of carious dentin is a demonstrable in-vivo process.
    • The natural repair mechanisms of dentin can restore mineral content and hardness over time.
    • Further research could explore factors influencing the rate and extent of dentin recalcification.

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